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Finding the Fourth Proportional to 2,986.13, 4,479.21 and 934.13

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Solution

The fourth proportional to 2,986.13, 4,479.21 and 934.13 is: 1,401.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.13 : 4,479.21 = 934.13 : x
  2. Step 2: Convert to fraction form
    2,986.13/4,479.21 = 934.13/x
  3. Step 3: Cross multiply
    2,986.13x = 4,479.21 × 934.13
  4. Step 4: Simplify right side
    2,986.13x = 4,184,142.04
  5. Step 5: Solve for x
    x = 4,184,142.04/2,986.13
  6. Step 6: Final answer
    x = 1,401.19

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.